<http://schema.org/about>
"Having closely followed and written about energy for a number of years, we at the Earth Policy Institute know that there is an enormous potential for raising energy productivity. This becomes clear in comparisons of energy use among countries. Some"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/raising-energy-productivity.html>